1 - Before you start, make sure your computer is set for its maximum
image quality--that's a screen size of at least 800 by 600, and 16 bit
color minimum.

2
- Set your monitor for maximum contrast. Use the controls on the monitor.

3
- Use the test pattern below to set shadow point. It has 9 very dark
vertical patches. Adjust
your monitor's brightness so that patch area 1 to 3 are entirely black,
and patches 4 and up are barely visible. If you can see the patch 1
and 2 distinctly, then your brightness is set too high.

4 - You should now see a fine gradation in the grey scale below.
Depending on the quality of your monitor and display
card, you might be able to see a smooth transition from pure while to
pure black. You can tweak the brightness
and contrast controls on the monitor so that this test scale looks optimal.